Strange turn signal issue

My driver's side rear turn signal isn't working. I've switched it with a couple of other bulbs (which are working) and nothing - it still doesn't work. The other lights in the cluster all work. I can't imagine the indicator would be on its own fuse - would it? The front and side turn signal bulbs are working. The system is also doing that double time tick. Any ideas?
 
Went out and had a play with the wiring harness / connector that plugs into the cluster. When I move it about, the light works. Hopefully it holds the way I've put it back together.
 
Went out and had a play with the wiring harness / connector that plugs into the cluster. When I move it about, the light works. Hopefully it holds the way I've put it back together.

had this issue on a mates 197...it was the wire going in to the multiplug...managed to push it in a small amount and cable tie it in position
and so far been fine
 
Will open it up and find a more permanent solution like you guys have - doubt it's going to stay put the way I've put it back.